9th Class Science Tissues Question Bank Case Based MCQs - Tissues

  • question_answer
    Read the passage given below and answer the questions from [6] to [10].
    The outermost layer of the cells is called epidermis. The epidermis is usually made of a single layer of cells.
    In some plants living in very dry habitats, epidermis may be thicker since protection against water loss is critical.
    The entire surface of a plant has an outer covering of epidermis. It protects all the parts of the plant.
    Epidermal cells on the aerial parts of the plant often secrete a waxy, water-resistant layer on their outer surface. That aids in protection against loss of water, mechanical injury and invasion by parasitic fungi. Since, it has a protective role to play, cells of epidermal tissue form a continuous layer without intercellular spaces. Most epidermal cells are relatively flat. Often their outer and side walls are thicker than the inner wall. Woody stems and structures like potato tubers, produce a second covering called periderm.
    Walls of epidermal cells contain

    A) chloroplast                                

    B) chlorophyll

    C) cutin                                        

    D) lignin

    Correct Answer: C

    Solution :

    [c] The walls of epidermal cells of the above ground parts of plants contain cutin and are covered by cuticle.


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